Boston Fern vs Onion

Side-by-side plant comparison — which is right for your garden?

Boston Fern

Nephrolepis exaltata

Nephrolepidaceae · ferns

Deer ResistantMedium Maintenance

Onion

Allium cepa

Amaryllidaceae · vegetables

EdibleDeer ResistantLow Maintenance

Hardiness Zone Range

Boston Fern (Zones 9-11)

Onion (Zones 3-9)

Overlap: Both grow in zones 9–9

Detailed Comparison

Feature	Boston Fern	Onion
Scientific Name	Nephrolepis exaltata	Allium cepa
Family	Nephrolepidaceae	Amaryllidaceae
Category	ferns	vegetables
Sun	⛅ Part Shade to Full Shade	☀️ Full Sun
Water	💧💧💧 High	💧💧 Medium
Soil	Rich, Moist	Rich, Well-drained
Height	3'	1' 6"
Spread	4'	4"
Bloom Season	Non-flowering	Summer
Bloom Color	None	White
Growth Rate	Fast	Medium
Native Region	Tropical Americas	Central Asia
Maintenance	Medium	Low

Special Traits

Boston Fern

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Onion

Yes — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Boston Fern

✓Mist frequently or use humidity tray.
✓Water when top inch of soil is dry.
✓Keep away from heating vents.
✓Trim brown fronds at base.
✓Divide when crowded.

Onion

✓Match variety to your latitude — long-day for north, short-day for south.
✓Plant sets or transplants for easiest results.
✓Stop watering when tops fall over.
✓Cure for 2 weeks before storing.

Which Plant Is Right for Your Garden?

Choose Boston Fern if you don't mind medium maintenance, and want deer resistance. It thrives in part shade to full shade with high water in zones 9–11.

Choose Onion if you want a low-maintenance plant, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

Plant them together? Both overlap in zones 9–9. However, they have different sun needs, so plan your garden layout carefully.

View Boston FernProfile →View OnionProfile →

Frequently Asked Questions

Can Boston Fern and Onion grow in the same hardiness zone?

Boston Fern grows in USDA zones 9-11, while Onion grows in zones 3-9. Both plants can grow together in zones 9 through 9.

Do Boston Fern and Onion have the same sun and water needs?

Boston Fern needs part shade to full shade and high water, while Onion needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Boston Fern or Onion?

Boston Fern grows taller at 3' compared to Onion at 1' 6". Boston Fern spreads 4' while Onion spreads 4".

Are Boston Fern and Onion deer resistant?

Yes, both Boston Fern and Onion are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Boston Fern or Onion?

Boston Fern has medium maintenance while Onion has low maintenance. Onion may be easier for beginning gardeners to manage.

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Detailed Comparison

Feature	Boston Fern	Onion
Scientific Name	Nephrolepis exaltata	Allium cepa
Family	Nephrolepidaceae	Amaryllidaceae
Category	ferns	vegetables
Sun	⛅ Part Shade to Full Shade	☀️ Full Sun
Water	💧💧💧 High	💧💧 Medium
Soil	Rich, Moist	Rich, Well-drained
Height	3'	1' 6"
Spread	4'	4"
Bloom Season	Non-flowering	Summer
Bloom Color	None	White
Growth Rate	Fast	Medium
Native Region	Tropical Americas	Central Asia
Maintenance	Medium	Low

Care Tips

Boston Fern

✓Mist frequently or use humidity tray.
✓Water when top inch of soil is dry.
✓Keep away from heating vents.
✓Trim brown fronds at base.
✓Divide when crowded.

Onion

✓Match variety to your latitude — long-day for north, short-day for south.
✓Plant sets or transplants for easiest results.
✓Stop watering when tops fall over.
✓Cure for 2 weeks before storing.

Which Plant Is Right for Your Garden?

Choose Boston Fern if you don't mind medium maintenance, and want deer resistance. It thrives in part shade to full shade with high water in zones 9–11.

Choose Onion if you want a low-maintenance plant, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

Plant them together? Both overlap in zones 9–9. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Boston Fern and Onion grow in the same hardiness zone?

Boston Fern grows in USDA zones 9-11, while Onion grows in zones 3-9. Both plants can grow together in zones 9 through 9.

Do Boston Fern and Onion have the same sun and water needs?

Boston Fern needs part shade to full shade and high water, while Onion needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Boston Fern or Onion?

Boston Fern grows taller at 3' compared to Onion at 1' 6". Boston Fern spreads 4' while Onion spreads 4".

Are Boston Fern and Onion deer resistant?

Yes, both Boston Fern and Onion are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Boston Fern or Onion?

Boston Fern has medium maintenance while Onion has low maintenance. Onion may be easier for beginning gardeners to manage.